breakthrough

a military movement or advance all the way through and beyond an enemy's front-line defense.

an act or instance of removing or surpassing an obstruction or restriction; the overcoming of a stalemate: The president reported a breakthrough in the treaty negotiations.

any significant or sudden advance, development, achievement, or increase, as in scientific knowledge or diplomacy, that removes a barrier to progress: The jet engine was a major breakthrough in air transport.

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adjective

constituting a breakthrough: engineered with breakthrough technology; Critics called it a breakthrough film.